Author: Xu, Jinwei; Xiao, Xin; Zhang, Wenbo; Xu, Rong; Kim, Sang Cheol; Cui, Yi; Howard, Tyler T.; Wu, Esther; Cui, Yi
                    Title: Air-Filtering Masks for Respiratory Protection from PM(2.5) and Pandemic Pathogens  Cord-id: zeh4742j  Document date: 2020_11_20
                    ID: zeh4742j
                    
                    Snippet: Air-filtering masks, also known as respirators, protect wearers from inhaling fine particulate matter (PM(2.5)) in polluted air, as well as airborne pathogens during a pandemic, such as the ongoing COVID-19 pandemic. Fibrous medium, used as the filtration layer, is the most essential component of an air-filtering mask. This article presents an overview of the development of fibrous media for air filtration. We first synthesize the literature on several key factors that affect the filtration perf
                    
                    
                    
                     
                    
                    
                    
                    
                        
                            
                                Document: Air-filtering masks, also known as respirators, protect wearers from inhaling fine particulate matter (PM(2.5)) in polluted air, as well as airborne pathogens during a pandemic, such as the ongoing COVID-19 pandemic. Fibrous medium, used as the filtration layer, is the most essential component of an air-filtering mask. This article presents an overview of the development of fibrous media for air filtration. We first synthesize the literature on several key factors that affect the filtration performance of fibrous media. We then concentrate on two major techniques for fabricating fibrous media, namely, meltblown and electrospinning. In addition, we underscore the importance of electret filters by reviewing various methods for imparting electrostatic charge on fibrous media. Finally, this article concludes with a perspective on the emerging research opportunities amid the COVID-19 crisis.
 
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